Amos h



' (No Model.) A

. A. H. PERKINS. METHOD 0F RBPAIRING ASPHALT PAVEMENTS.

Nd. 501,537.;v Patented July v18, 189s.

rrnn STATES AMOS H. PERKINS, OF CHICAGO, ILLINOIS, ASSIGNOR TOTHE'WESTERN PAVING AND SUPPLYCOMPANY, OF SAME PLACE.

SPECIFICATION forming part of Letters Patent No. 501,537, dated July 18,1893.

To @ZZ whom it may concern:

Be it known that I, AMos H. PERKINS, a citizen of the United States,residing at Chicago, county of Cook,State of Illinois, have invented acertain new and useful Improvement in the Method of Repairing AsphaltPavements; and I declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it pertains to make and use the same, reference being hadto the accompanying drawings, which form a part of this specification.

My invention is designed to produce a methodwherebythe repairing ofasphalt pavements may be quickly and cheaply accomplished and aneaterappearin g pavement be obtained after repairing than hasheretofore been the case.

Heretofore in the repairing it has been customary to dig out with a pickor other instrument the surface material around the spot to be repaired,sometimes applying heat to the spot to soften the material so that itmay be more easily removed. When the material has been removed thedepression thus made is thoroughly cleaned and given a coat or dressingof tar. New material in a heated state has then been placed in thedepression and been ironed down and smoothed off in the usual manner ofnishing, the tar acting as a solder to hold the new material in place.When completed, however, the line or joint between the old hardenedmaterial and the new material has been plainly discernible and moreoften there has been more or less of a ridge. Again this new block ofmaterial by reason of frost or from other causes is frequently tornloose from its soldered connection with the old materialthusnecessitating new repairs. In practicing my invention however I subjectthe spot to be repaired and the surrounding edges to such a degree ofheat that the surface asphalt, not only the exact spot to be repairedbut the surrounding portion to a greater or less degree, is reduced tothe soft pliable state in which it is originally laid. With arake orother suitable instrument it is then agitated and mixed with enough newmaterial to fill up the spot to be repaired. It is then subjected to theusual finishing operation o'f ironing and burnishing. The heat-Application led March 8, 1893. Serial No. 465,137, (No model.)

ing of the surface may be accomplished in various ways and byv means ofvarious forms of apparatus and while I have herein shown but one formfor accomplishing the result, yet I would have it understood that I donot limit myself to any particular form of apparatus for carrying out myinvention.

In the drawings Figure l'represents a side elevation; Fig. 2 an endelevation of an apparatus for heating the pavement after it is laid.

In carrying out the invention A represents a suitable tank for carryinggasoline mounted on the wheeled frame B and connected by the pipe C witha series of horizontal pipes D. These pipes D carry a series of burnersE which pass through a hood or shield F and project a flame downwardagainst the pavement. Pressure is then' obtained upon the gasoline toforce it 'to the burners and to produce a blast by means of an air pumpG mounted upon the tanke The apparatus is also provided with a handle IIwhereby the operator may readily move it to the desired spot. Now aswould be seen by turning on as many of the burners as are desired astrong blast of heat is projected against the surface of the asphalt andreadily melts it. As explained above when it is `desired to repair aspot the apparatus is moved adjacent thereto with the burners directlyabove the spot. These soon reduce the surface asphalt both at the spotand at the surrounding edges to a pliable state, the strong blastcausing not only the immediate surface, but the particles deep downto bemelted and yet not burned. With a rake or other suitable instrument theoperator then agitates or stirs up the softened material and by addingnew material of substantially the same degree of softness the spot ordepression to be repaired is filled up and subjected to the usualsmoothing and finishing operation as in the case of a new pavement.This, as will be seen, is done without the use of the tar forthe purposeof uniting the parts or sections of material and is done without anydistinct 4dividing line between the old and new material. In fact, thereis no dividing line because the new material has been mixed with and be-IOO comes a part of the old material. As stated above While heating thespot to be repaired the surrounding edges or portions must be heated toa greater or less degree and the new material is worked into these edgesas Well as in the spot to be repaired so that when hardened it ispracticallyimpossible to tell where the pavement has been repaired.

What I claim isl. The method of repairing asphalt pavements whichconsists in subjecting the spot to be repaired to heat adding newmaterial and smoothing and bnrnishing it, substantially as described.

2. The method of repairing asphalt pavements which consists insubjecting the spot to be repaired to heat until the material issoftened, agitating it and mixing with it new material and finallysmoothing and burnishing it, substantially as described.

AMOS H. PERKINS.

Vitnesses:

TODD MASON, O. R. BARNETT.

